The closing of Rock N Roller Coaster has been postponed
Originally planned for January 6, 2019, Rock 'n' Roller Coaster with Aerosmith will finally close in early summer 2019, for a reopening in IronMan - Avengers mode in 2021.
Source: http://wonderworldweb.over-blog.com/2018/02/disneyland-paris-annonce-la-transformation-de-rock-n-roller-coaster-sur-le-theme-de-marvel-c-est-la-surprise-du-jour-rock-n-roller-c